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08-05-2008, 09:45 PM
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#1 | |
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AF Newbie
Join Date: Apr 2008
Location: southlake, Texas
Posts: 2
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Proper iridium spark plug gap
I bought plugs, AC Delco #41-985, and was planning to gap them to the recommended .060" for my 2001 Yukon XL 5.3. I have seen several sites on the internet that recommend not changing the gap on these AC Delco iridium plugs from .040". Do I gap these plugs to .060" or .040"?
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08-06-2008, 02:59 PM
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#2 | |
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A990 racer
 Join Date: Mar 2002
Location: Chestertown, New York
Posts: 17,026
Thanks: 26
Thanked 381 Times in 372 Posts
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Re: Proper iridium spark plug gap
Set them at the GM recommended setting for your truck
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